[18p-PB1-1~73] 10 Spintronics and Magnetics (Poster)

[18p-PB1-15] Damping Factors of Ferromagnetic Multilayers Including Rashba Interfaces

〇Shunichi Seno¹, Satoshi Tomita¹, Takeshi Kato², Daiki Oshima², Satoshi Iwata², Nobuyoshi Hosoito¹, Hisao Yanagi¹ (1.NAIST, 2.Nagoya Univ.)

Keywords:time-resolved magneto-optical Kerr effect, Rashba effect

The giant Rashba effect occurs at a silver(Ag) and bismuth(Bi) interface due to the broken space inversion symmetry and large spin-orbit coupling in Bi. Moreover, the spin-to-charge conversion at the Ag/Bi interfaces has been reported. It is expected that the interfaces have an effect on the magnetization dynamics in ferromagnetic films adjacent to a Ag/Bi bilayer. Therefore, we investigate here the magnetization dynamics, especially damping factors, in the permalloy/Ag/Bi multilayers by using time-resolved magneto-optical Kerr effects.